Title:
HEAT-TREATED STEEL MATERIAL AND HEAT TREATMENT METHOD FOR STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/220238
Kind Code:
A1
Abstract:
The present invention provides a heat-treated steel material which has both excellent tensile strength and excellent toughness. A heat-treated steel material which contains, in mass%, 0.38 to 1.05% of C, 0.0 to 1.0% of Mn, 0.0 to 0.50% of Cr and 0.0 to 1.5% of Si, with the balance being made up of Fe and unavoidable impurities, wherein the average crystal grain size at a grain boundary setting angle of 15° is 10 × C + 7 (μm) or less (meanwhile, C represents the carbon content (%)).
Inventors:
ISHIMOTO KAZUHIRO (JP)
Application Number:
PCT/JP2022/017584
Publication Date:
October 20, 2022
Filing Date:
April 12, 2022
Export Citation:
Assignee:
TOKYO ROPE MFG CO (JP)
International Classes:
C21D9/52; C21D1/40; C21D1/42; C21D1/48; C22C38/00; C22C38/18
Domestic Patent References:
| WO2020032785A1 | 2020-02-13 | |||
| WO2018012625A1 | 2018-01-18 |
Foreign References:
| JPH06322480A | 1994-11-22 | |||
| JP2008007856A | 2008-01-17 | |||
| JP2017504721A | 2017-02-09 | |||
| JPH10183242A | 1998-07-14 | |||
| JP2016056438A | 2016-04-21 | |||
| JP3599551B2 | 2004-12-08 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION TOKYO UIT INTERNATIONAL (JP)
Download PDF:
Previous Patent: RAILROAD WHEEL
Next Patent: PRODUCTION METHOD FOR SEMICONDUCTING SINGLE-WALLED CARBON NANOTUBE DISPERSION
Next Patent: PRODUCTION METHOD FOR SEMICONDUCTING SINGLE-WALLED CARBON NANOTUBE DISPERSION